Peters



(Model.)

0. B. TIBBLES. SEWING MACHINE SHUTTLE.

No. 328,537. Patented Oct. 20,- 1885.

5 vezz Z02" czwzegz. 115255 N. PETERS. Howling-aw, Walhinflon. By C.

I IJNrrlin TATES IFFICEQ ATE-NT CHARLES-E. TIBBLES, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE TIBBLES MANUFACTURING COMPANY, OF SAME PLACE.

SEWING-MACHINE SHUTTLE.

SPECIFICATION forming part of Letters Patent No. 328,537, dated October 20, 1885.

Application filed March 5, 1885. Serial No. 157,787. (ModeL) To all whom it may concern.-

Be it known that I, CHARLES E. TIBBLEs, of Chicago, in the county of Cook and State of Illinois, have invented a new and Improved Sewing'Machine Shuttle; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making part of this specification, in which Figure 1 is a plan view of the shuttle. Fig. 2 is a vertical sectional view of the same. Fig. 3 is a plan view of the shuttle tensionspring. Fig. 4 is a section on the line now of Fig. 3. Fig. 5 illustrates sections on the lines g y and zz of Fig. 3. Fig. 6 is a plan view of the shuttle with the tension-spring removed. Fig. 7 is a bottom plan view of the shuttle. Figs. 8, 9, 10 are details to be referred to.

My invention relates to sewing machine shuttles generally, but refers directly more properly to shuttles which are cylindrical, and has for its object to provide a shuttle which will be cheaply made, easily threaded, and have extended wear on the tension-holes; and to this end my invention consists, first, in a shuttle, in combination with a tensionspring, having the metal of said spring punched or doubled back around the hole, so as to produce a double round-edged thickness of metal in the spring to form a bearing-surface for the thread to pass over as it runs from the bobbin; secondly, in a slotted screw, in combination with an end of the tension-spring, whereby the end of the tension-spring is raised and lowered positively, in contradistinction to the rebound of the spring raising the spring, and thirdly, in sundry details of construction, all of which will be hereinafter fully described, and specifically pointed out in the claims.

In order that those skilled in the art may make and use my invention, I will proceed to describe the exact manner in which I have carried it out.

In the said drawings, A is the body of the shuttle, cylindrical in general form, and having its point and heel at a a dressed into a curve conforming to the race, and a curved slot, d, for a thread-race, and a straight slot, (2, communicating with the curved slot outwardly at the heel. In the interior of the shuttle and at the point is a cylindrical recess,

1), in which is placed a spring-plunger, I), designed to bear with a spring-pressure on one end of the bobbin B, the other end being held by the heel-latch F when it is closed.

The tension-spring E is struck from steel about in the shape shown in Fig. 3, one end, 6, being bifurcated to engage a grooved or slotted screw, D, to adjustably secure one end of the spring to the shuttle near the point. The spring E is struck with an extensionpiece, E, which is doubled back at 6 against the bottom of the spring to form a bearing for the pintle of the hinge e, which secures the heel-latch F to the shuttle, and said extension E is also provided with a headed pin, f, designed to be pushed into slot (1 as the spring E is placed, and secure the end of the tensionspring and the heel-latch to the shuttle in a yielding manner, through that portion of the extension E and spring between the headed pin f and the hinge e. The latch is provided with a small beveled lug, g, which enters a hole, in the shuttle-shell at the moment that a lug, h, brings up against the bottom of a slot, h, in the edge of the shell, and prevents the latch from passing too far inwardly.

The tensionspring E is provided with three thread holes, 2 3 4, the hole 2 being prolonged into a slot, the end of which rests over a depression, 5, in the shuttle, to facilitate passing the thread downwardly through said hole 2. The holes 3 and 4 are joined by means of a triangular slot, 2', for a purpose hereinafter set out, and the peak or point of metal Within the angle of this slot is struck down slightly below the plane of the body of the spring. By this construction of spring and thread-holes I am enabled to thread three tension-holes, and thereby get a non-variable tension and at the same time only have to pass the thread endwise through one of the thread holes. The thread is always in this shuttle carried from the thread-race at over the edge of the spring and passed endwise downward through the hole 2 and slot. The end of the thread is then brought so there is a tension on it toward the point of the shuttle, and the bight of the thread runs into hole 2 proper, and the thread passes behind the point of the downwardly-sprung angular tongue, and the thread then is drawn outwardly, riding up IOC over the downwardly-sprung angular tongue,

pressure, to avoid loose coils running off with in the shuttle; but the use of such spring+preSS- J ure has heretofore been detrimental, because of the unequal pull on thethreadas the coils? left'thebobbin atdi'fferent points of its length; and to compensate for this unequal pull II have combined inimyimproved shuttlev an end f spring-pressuredevice for holding. the bobbin l with a curved thread race, wherebyithe movementof the thread ,over the curvilinear sur-{ face preventsthe vcoilsrunning offthe bobbin} faster than the thread is used, and equalizes thepull of the thread from end to end of the bobbin.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isv I 1. Spring E, provided with a hole or holes .having theedges doubledbaclgin combination with the shuttle-shell A, substantially as described.

v 2. 5 Spring E, having the extension E doubled pin f,,in combination with theshuttlefbody A, provided with-the slot 11, substantially as described.

The heel-latch F, yieldingly secured, and provided withstop-lug hiand beveled:fasten ing-lug g, in ,eombination withrthe heel of the shuttle-case, having slot/h .and hole 9', sub- .stantially as-described.

' Witnesses:

. F. A. ELLswoRTu, T. 0. BREGHT.

back on the body, and provided with headed .oHARLEs TIBBLES. 

